mod/photo.php

   1 <?php
   2
   3 /**
   4  * @file mod/photo.php
   5  */
   6 use Friendica\App;
   7 use Friendica\Database\DBM;
   8 use Friendica\Object\Image;
   9
  10 require_once 'include/security.php';
  11
  12 function photo_init(App $a)
  13 {
  14         global $_SERVER;
  15
  16         $prvcachecontrol = false;
  17         $file = "";
  18
  19         switch ($a->argc) {
  20                 case 4:
  21                         $person = $a->argv[3];
  22                         $customres = intval($a->argv[2]);
  23                         $type = $a->argv[1];
  24                         break;
  25                 case 3:
  26                         $person = $a->argv[2];
  27                         $type = $a->argv[1];
  28                         break;
  29                 case 2:
  30                         $photo = $a->argv[1];
  31                         $file = $photo;
  32                         break;
  33                 case 1:
  34                 default:
  35                         killme();
  36                         // NOTREACHED
  37         }
  38
  39         if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
  40                 header('HTTP/1.1 304 Not Modified');
  41                 header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
  42                 header('Etag: ' . $_SERVER['HTTP_IF_NONE_MATCH']);
  43                 header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
  44                 header("Cache-Control: max-age=31536000");
  45                 if (function_exists('header_remove')) {
  46                         header_remove('Last-Modified');
  47                         header_remove('Expires');
  48                         header_remove('Cache-Control');
  49                 }
  50                 exit;
  51         }
  52
  53         $default = 'images/person-175.jpg';
  54         $public = true;
  55
  56         if (isset($type)) {
  57                 // Profile photos
  58                 switch ($type) {
  59                         case 'profile':
  60                         case 'custom':
  61                                 $resolution = 4;
  62                                 break;
  63                         case 'micro':
  64                                 $resolution = 6;
  65                                 $default = 'images/person-48.jpg';
  66                                 break;
  67                         case 'avatar':
  68                         default:
  69                                 $resolution = 5;
  70                                 $default = 'images/person-80.jpg';
  71                                 break;
  72                 }
  73
  74                 $uid = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $person);
  75
  76                 foreach (Image::supportedTypes() AS $m => $e) {
  77                         $uid = str_replace('.' . $e, '', $uid);
  78                 }
  79
  80                 $r = q("SELECT * FROM `photo` WHERE `scale` = %d AND `uid` = %d AND `profile` = 1 LIMIT 1",
  81                         intval($resolution),
  82                         intval($uid)
  83                 );
  84                 if (DBM::is_result($r)) {
  85                         $data = $r[0]['data'];
  86                         $mimetype = $r[0]['type'];
  87                 }
  88                 if (empty($data)) {
  89                         $data = file_get_contents($default);
  90                         $mimetype = 'image/jpeg';
  91                 }
  92         } else {
  93                 // Other photos
  94                 $resolution = 0;
  95                 $photo = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $photo);
  96
  97                 foreach (Image::supportedTypes() AS $m => $e) {
  98                         $photo = str_replace('.' . $e, '', $photo);
  99                 }
 100
 101                 if (substr($photo, -2, 1) == '-') {
 102                         $resolution = intval(substr($photo, -1, 1));
 103                         $photo = substr($photo, 0, -2);
 104                 }
 105
 106                 // check if the photo exists and get the owner of the photo
 107                 $r = q("SELECT `uid` FROM `photo` WHERE `resource-id` = '%s' LIMIT 1",
 108                         dbesc($photo),
 109                         intval($resolution)
 110                 );
 111                 if (DBM::is_result($r)) {
 112                         $sql_extra = permissions_sql($r[0]['uid']);
 113
 114                         // Now we'll see if we can access the photo
 115                         $r = q("SELECT * FROM `photo` WHERE `resource-id` = '%s' AND `scale` <= %d $sql_extra ORDER BY scale DESC LIMIT 1",
 116                                 dbesc($photo),
 117                                 intval($resolution)
 118                         );
 119                         if (DBM::is_result($r)) {
 120                                 $resolution = $r[0]['scale'];
 121                                 $data = $r[0]['data'];
 122                                 $mimetype = $r[0]['type'];
 123                                 $public = $r[0]['allow_cid'] == '' && $r[0]['allow_gid'] == '' && $r[0]['deny_cid'] == '' && $r[0]['deny_gid'] == '';
 124                         } else {
 125                                 // The picure exists. We already checked with the first query.
 126                                 // obviously, this is not an authorized viev!
 127                                 $data = file_get_contents('images/nosign.jpg');
 128                                 $mimetype = 'image/jpeg';
 129                                 $prvcachecontrol = true;
 130                                 $public = false;
 131                         }
 132                 }
 133         }
 134
 135         if (empty($data)) {
 136                 if (isset($resolution)) {
 137                         switch ($resolution) {
 138                                 case 4:
 139                                         $data = file_get_contents('images/person-175.jpg');
 140                                         $mimetype = 'image/jpeg';
 141                                         break;
 142                                 case 5:
 143                                         $data = file_get_contents('images/person-80.jpg');
 144                                         $mimetype = 'image/jpeg';
 145                                         break;
 146                                 case 6:
 147                                         $data = file_get_contents('images/person-48.jpg');
 148                                         $mimetype = 'image/jpeg';
 149                                         break;
 150                                 default:
 151                                         killme();
 152                                         // NOTREACHED
 153                                         break;
 154                         }
 155                 }
 156         }
 157
 158         // Resize only if its not a GIF and it is supported by the library
 159         if ($mimetype != "image/gif" && in_array($mimetype, Image::supportedTypes())) {
 160                 $Image = new Image($data, $mimetype);
 161                 if ($Image->isValid()) {
 162                         if (isset($customres) && $customres > 0 && $customres < 500) {
 163                                 $Image->scaleToSquare($customres);
 164                         }
 165                         $data = $Image->asString();
 166                         $mimetype = $Image->getType();
 167                 }
 168         }
 169
 170         if (function_exists('header_remove')) {
 171                 header_remove('Pragma');
 172                 header_remove('pragma');
 173         }
 174
 175         header("Content-type: " . $mimetype);
 176
 177         if ($prvcachecontrol) {
 178                 // it is a private photo that they have no permission to view.
 179                 // tell the browser not to cache it, in case they authenticate
 180                 // and subsequently have permission to see it
 181                 header("Cache-Control: no-store, no-cache, must-revalidate");
 182         } else {
 183                 header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
 184                 header('Etag: "' . md5($data) . '"');
 185                 header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
 186                 header("Cache-Control: max-age=31536000");
 187         }
 188         echo $data;
 189
 190         // If the photo is public and there is an existing photo directory store the photo there
 191         if ($public and $file != '') {
 192                 // If the photo path isn't there, try to create it
 193                 $basepath = $a->get_basepath();
 194                 if (!is_dir($basepath . "/photo")) {
 195                         if (is_writable($basepath)) {
 196                                 mkdir($basepath . "/photo");
 197                         }
 198                 }
 199
 200                 if (is_dir($basepath . "/photo")) {
 201                         file_put_contents($basepath . "/photo/" . $file, $data);
 202                 }
 203         }
 204
 205         killme();
 206         // NOTREACHED
 207 }